Matrices always go row x column.
Count the rows: 4
Count the columns: 3
The matrix is a 4 x 3 matrix
Answer:
Step-by-step explanation:
You need 2 columns and 4 rows of data here:
x y
1 30
2 60
3 90
4 120
Each time x increases by 1, y increases by 30, so the relationship between x and y is y = previous y + 30. This is the 3rd answer choice.
Solve the following system of equations:
2x + 3y = 40
-2x + 2y = 20
We can add these equations to get a new equation. Then we can solve for y:
0 + 5y = 60
5y = 60
y = 12
2x + 3y = 40, plug in y = 12 and solve for x:
2x + 36 = 40
2x = 4
x = 2
Choice A
Answer:
in comments under the question
Answer:
50 - 19.83 = $30.17
Step-by-step explanation:
